I have aquired a knock off of a aquasport flat back. All I know about the boat is its a 1977 and it was made in maitland fl. The original owner thinks the manufacturers name was Sun "something". Anyways, It looks exactly like a flatback I was woundering what the draft is on the flat backs? Its got a 150 yamaha on it now, But thats coming off and a yamaha 175 is goin on. And most all I have seen have the porta brackets on them? Is this needed or will a 6inch set back bobs jackplate work? Also with a jackplate how skinny will a flatback run?